question

Gergely Zsolt avatar image
Gergely Zsolt asked

error #28 bluesolar 150/100

Hi!


I have in the system one Bluesolar 150/100. I have 12 solar panels with 330W each.

Only the half is connected (2 parallel x 3 series)

The problem is that when the solar power is rising above 1000W the Bluesolar shuts down and alarm is triggered:

Alarm #28 Charger power stage issue

screenshot-20220616-113213.png

If the power is under 1000W everything is working fine.

The firmware is the last available v1.59


Is there any solution?

Thank You!

MPPT Controllers
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4 Answers
nickdb avatar image
nickdb answered ·

What are the panel specs?

Is this a 12/24/48V system?

What is attached to it?

A bit more info would help.

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Gergely Zsolt avatar image
Gergely Zsolt answered ·

Panels are Sharp NU-JC 330

Voc 41.32

Isc 10.35

48 Volt battery

Multiplus II 48/5000 screenshot-20220616-121504.png


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nickdb avatar image
nickdb answered ·

The error description is as follows from docs:

Err 28 - Power stage issue

This error will not auto-reset.

Disconnect all wires, and then reconnect all wires. If the error persists the charge controller is probably faulty.

Note that this error was introduced in v1.36. So when doing an update, it might look like the firmware update caused this issue; but it doesn't. The Solar charger was then already not performing 100% before the update; updating to v1.36 or later merely made the issue more visible. The unit needs to be replaced.

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Gergely Zsolt avatar image
Gergely Zsolt answered ·

Thanks, but I readed also the docs.

What other option I have?

1 comment
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nickdb avatar image nickdb ♦♦ commented ·
If you have checked everything and followed the guidance, then there is little else you can do if the charger is faulty apart from replace it.

At 1000W you are well under spec, and at 3 serial panels seem reasonably within limits.

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